Move Animatable* hierarchy into new folder.

Source/core/animation/animatable/AnimatableLengthPoint3D.h

 /*
  * Copyright (C) 2014 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef AnimatableLengthPoint3D_h
 #define AnimatableLengthPoint3D_h
 
-#include "core/animation/AnimatableValue.h"
+#include "core/animation/animatable/AnimatableValue.h"
 
 namespace WebCore {
 
 class AnimatableLengthPoint3D FINAL : public AnimatableValue {
 public:
     virtual ~AnimatableLengthPoint3D() { }
     static PassRefPtrWillBeRawPtr<AnimatableLengthPoint3D> create(PassRefPtrWillBeRawPtr<AnimatableValue> x, PassRefPtrWillBeRawPtr<AnimatableValue> y, PassRefPtrWillBeRawPtr<AnimatableValue> z)
     {
         return adoptRefWillBeNoop(new AnimatableLengthPoint3D(x, y, z));
     }
@@ skipping 23 matching lines @@
 
 inline const AnimatableLengthPoint3D* toAnimatableLengthPoint3D(const AnimatableValue* value)
 {
     ASSERT_WITH_SECURITY_IMPLICATION(value && value->isLengthPoint3D());
     return static_cast<const AnimatableLengthPoint3D*>(value);
 }
 
 } // namespace WebCore
 
 #endif // AnimatableLengthPoint3D_h